If you got it figured out can I get the tweet length tutorial because this shit is not intuitive.
In group mode:
Doodad to the left - Force roll/Give to player/etc toggle (I don't suggest using it 99% of the time seems only there for raids if you ask me)
Dice (only shows for Loot person) - Random this item always or not (I'd suggest always turning this on for each new drop)
N - Need (Rolls with highest priority in the group)
G - Greed (Rolls against other Greed rolls, automatically passes to Need)
NO - Never (Don't loot this item, this time)
AN - Always Need (Automatically select Need for this item forever*)
AG - Always Greed (Automatically select Greed for this item forever*)
NV - Always Never (Automatically select Never for this item forever*)
*forever being until/unless you modify it in Loot Settings or when you see a future drop. It's just a default that you're setting and if you're not ignoring things you can "catch" to adjust later.
Solo:
Loot - Loot the item
Leave - Leave the item
AN - Always Need (loot the item in solo)
AG - Alway Greed (loot the item in solo)
Never - Always Never (never loots it in either mode)
At least thats off my head - it's possible I glitched on some of the Never abbreviations in group mode.